DTC B1772 Seat Position Sensor Circuit Malfunction: Description

WARNING: This page is about a different car, the 2008 Scion xB. However, it is still accessible from the selected car via links, so may be relevant.

The seat position sensor circuit consists of the occupant classification ECU and the seat position sensor. The seat position sensor sends the seat position signal to the occupant classification ECU to control the dual stage deployment of the front passenger airbag assembly.

DTC B1772 is recorded when a malfunction is detected in the seat position sensor circuit.

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
B1772	One of following conditions is met Occupant classification ECU receives line short circuit signal, and open circuit signal, short circuit to ground signal or short circuit to B+ signal in seat position sensor circuit for 2 seconds Seat position sensor malfunction Occupant classification ECU malfunction	Front seat wire RH Seat position sensor Occupant classification ECU

HINT:

When DTC B1650/32 is detected as a result of troubleshooting for the "AIRBAG SYSTEM", check the DTCs stored in the occupant classification ECU. When DTC B1772 is output, perform troubleshooting for the DTC.